Coaxial multiplex position detector and rotating machine using coaxial multiplex position detector

Abstract

In a coaxial multiplex position detecting apparatus for a rotating machine, a stator includes stator pieces, each stator piece individually being split in a circumferential direction of the stator, an exciting current winding, and a detection winding, the exciting current winding and the detection winding being wound on the respective stator pieces, and a plurality of rotors are disposed on outside and inside positions of the stator in a radial direction of the stator, the respective rotors having convex and recess portions in accordance with the number of poles that the respective rotors have and having different numbers of poles according to the inside and outside positions of the rotors from each other, revolution positions of the respective rotors being determined according to an output signal of the detection winding of the stator.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a multiplex position detector which is capable of detecting rotor positions of revolving members such as in a coaxial rotating machine and a rotating machine in which the multiplex position detector is mounted.[0003]2. Description of the Related Art[0004]In recent years, such a coaxial rotating machine as described above having a stator between an outer rotor and an inner rotor has been used. In such a kind of rotating machines as described above, both inner rotor and outer rotor as described above are independently revolved around the fixed stator. Hence, it is necessary to recognize positions of the respective outer rotor and inner rotor independently and separately. To cope with this necessity, a Japanese Patent Application First Publication No. 2000-14103 published on Jan. 14, 2000 exemplifies such separate detectors as outer rotor position detector for the outer rotor and inner roto...

AI Technical Summary

Benefits of technology

[0006]It is, therefore, an object of the present invention to provide a coaxial multiplex position detector which is capable of eliminating the increase in the axial length of the rotating machine and the increase in the electrical wirings when this detector is mounted in the rotating machine.

Problems solved by technology

Hence, a usage of the mutually independent position detectors causes increases in an axial length and in a wiring distribution of the rotating machine.

These provide major problems in rotating machines in which a compact structure is a most important problem.

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